An agent that "succeeds" can still hallucinate, call the wrong tool, or return a broken format. Nobody notices until it's running for a client. Miravig catches structural issues in your n8n and Make prompts before they ship, for free, without ever sending your prompt to a server.
$json.customer_name misplaced, {{ }} truncated by an auto-fix: the workflow still runs, just with the wrong data.
The model replies in JSON as requested, but wraps it in a code block or an introductory sentence. The parser breaks downstream, with no visible error.
An ID, a masked placeholder, or a clause meant to be copied verbatim: the model quietly rewords it, and the exact value disappears with no visible error.
The free tool examines your n8n or Make prompt from several angles: variable protection, output format, JSON encapsulation and content-drift risks. No quota, no sign-up.
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